Valve-grinding device.



.Patented Apr. 13, 1969.

R. H.. HAZELTINB.

I VALVE -GRINDING DEVICE, APPLIOATION FILED MAB. 2s, 190s,

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ROBERT H. HAZELTINE, OF NEW YORK, N. Y.

VALVE-GRIN DING DE VICE Specification of Letters Patent.

Patented April 13, ieoe.

Animation inea March 23, 190s. serial No. 422,767.

To .all .whom et .may concern:

Be it known that l, ROBERT H. Hazan- '11NE, :a citizen ofthe UnitedStates, and a resident V,of the borough Yof Manhattan, city, county, andState of New York, have invented certain new and useful Improvements inValve-Grinding Devices, of which the following is a specification,accompanied by drawings.

This invention lrelates to a valve grinding device and has for itsobjects to enable the valve to be evenly ground and accurately seated.Heretofore, devicesof this character have Abeen constructed to rotate avalve relative' :to its seat back and forth in one place, with a givenpositionof the tool, but the disadvantage of this operation resides inithe yfact that the valve is ground more at one `place than at another.According to my invention, the vtool is constructed to automaticallyreciprocate the valve and intermittingly impart a progressive' rotationto the same, whereby the grindingsuccessively takes place betweendii'erent parts of the valve and Aits seat, so that all parts aretreated to the same degree.

AFurther objects ofthe invention will hereinafter appear, andtheinvention consists of a valve grinding device for carrying out allthese-objects, embodying the features of construction, combinations ofelements, and arrangement of parts `having the general mode of-operationsubstantially as hereinafter -fully described and claimed in thisspecification and shown in the accompanying drawings, in which- Figure lis a side elevation of a valve grinding device embodying the invention,shown iii-connection with a portion of an engine vcylinder illustratedin section. ln this-view the parts of the tool are in a given positionstarting a stroke. Fig. 2 is a side elevation-of the'tool partly insection, with the stroke half completed. Fig. 3 is a side elevation-ofthe tool partly in section with the stroke completed and illustrating adifferent adjustment of the height of the tool. Fig. et is an 4endelevation of the tool partly in vtransverse section.` Fig. 5 is adiagrammatic illustration I of the operation of the tool, showing theprogressive movement of the valve in its operation. Fig. 6 is la detailview of they cam.

This iapp'l-icationis for thefsame invention as Vmy copendingapplication Serial No. 364,639, filed March 2G, 1907, .with additionalfeatures and improvements.

According to this invention the tool is adapted to be seated on thevalve chamber A and suitably connected to the valve =B which is to beground. The valve is shown on its seat C and for purposes ofillustration I have shown the valve of a gas engine, although anysuitable valve may 'be ground by .this tool and if desired, the valveholder may be suitably modified to `hold any valve upon which it isdesired to operate. in this instance, the rest or support D is .shown inthe form of a collar having feet E adapted to rest on the valve chamberA and this support D may be modified in any suitable manner foroperating the tool in connection with other forms of valves.

Means are provided Afor imparting a reciprocating motion to the valve .Bback and forth through any desired arc as for instance through ninetydegrees or one quarter of a revolution as illustrated in the drawings,but the angle of reciprocation may be adjusted to any desired amount.vMeans are also provided for automatically advancing the valveperiodically farther in one direction than in theother, whereby the.valve is given a progressive rotary movement at intervals, so thatdifferent surfaces between the valve and its seat are brought intocontact,.resulting in even grinding. l

Referring more particularly to the drawings, F represents a'suitableframe provided with the bosses Grand H, a handle f, legs J, and a hollowsocket K connected to the legs. rlhis frame F may be constructed in anysuitable form, not necessarily like that shown inthe drawings, p-rovidedthe different members of the tool are .suitably supported andoperatively connected. Journaled in the boss G is a driving shaft Lprovided with manually operated crank O at one end, and vjournaled inthe boss H is .a shaft P. The driving shaft L is provided with a pinionQ. connected to rotate therewith as by means of a key'R .and meshingwith this pinion is a gear S loose on the shaft P and held on the endthereof by any suitable means as a collar T pinned to the shaft by meansofthe pin U.

The end of the driving shaft L opposite to the crank O is provided witha crank ,V suitably connected to theshaft as by means of the keyWV andthis crank Vis yprovided llO with a pin X adjustably mounted in a slot Yas by means of the nut Z'.

On the end of the shaft P opposite to the gear S is loosely pivoted atoothed segment e provided with the teeth j. Connected to the segment asby means of the screw L is an arm g provided with a slot i into whichthe pin X extends, so that the arm g and segment e are reciprocated onthe shaft P as a pivot when the crank O is rotated. l am not to beunderstood as limiting the invention to the mechanism shown anddescribed, as any other suitable connections may be provided forcarrying out the objects of this invention.

A bevel gear j is suitably mounted to rotate on the frame of the tool inthe socket portion K and means are provided for talring the downwardthrust of the operating parts of the tool on this gear and forpi'eventing longitudinal movement of the gear. As shown, the gear isprovided with the boss or shoulder 7c adapted to be seated on thesurface o of the frame and the shank p of the gear is suitably connectedas by means of a set screw g to a sleeve r, adapted to rotate in thesocket K and seated under the shoulder s of the socket. The bevel gear jas shown is provided with the boss r' on its upper surface having fourslots or apertures a, b, c, d therein forming one member of the clutch.

Extending longitudinally and loosely through the gear j and its shank pis a vertical shaft or spindle u provided with means for holding vthevalve at its lower end and also provided intermediate its length with acollar o suitably connected to the spindle as by means of a pin lw. Thiscollar o is provided in this instance with two teeth a? and y adapted tocoperate with the slots a, c, fl of the gear. The collar o thus formsthe other member ofthe clutch and when the clutch members t and fv arein an engagement, the spindle u is reciprocated back and forth w'th thegear During the time that the collar v is disengaged from the oppositeclutch member, the gear j is operated without operating the spindle, andby this means the valve holder and the valve connected thereto may beheld from reciprocation during a predetermined stroke of the segment c,so that when the clutch members are again engaged the valve ispositively advanced or rotated to a different position relatively to itsseat. Means are provided for accomplishing this automatic adjustment ofthe device and means are also provided for guiding the upper end of thespindle u. A collar e is loosely carried on the upper end of the spindleu as by means of the screw 2 and this collar as shown is provided withlingers 3a extending outwardly at each side of one of the legs J of theframe to prevent the collar from turning. The inner side of the gear Sis slightly liollowed as shown, and provided with the cam or highportion adapted to be adjusted in length. Any suitable cain may beprovided, but in this in# stance, l have shown the gear S provided witha projection 3 cast within the rim and a plate Lladapted to sliderelatively to the proj ection 3 and of the same height. The plato il isprovided with a slot 5 through which a set screw G projects intosuitable spaced apertures 7 in the cast portion 3, so that the highportion ef the gear may be made longer or shorter as desired, and thusvary the interval during which the clutch members t and o aredisengaged. By this means the progressive movement of the valve isvaried through any desired arc.

ln order that the spindle a shall be raised by engagement with the cam3, el a roller or follower 30 is provided on a stud 3l connected to thecol-lar rlhis roller is of suliicient width to extend over both of themembers 3, l of the canL on the Gear S and. as the cam passes under saidroller 23() the spindle a is raised a sullicient distance to disengagethe teeth fc and l from the aper-` tures of the member t and .maintainthem out of engagement until the cam has passed from beneath the roller.Preferably the roller 30 should beadjusted at such a height that it doesnot touch the inner surface of gear S except when the cani 3, d comesunder the roller. This is to insure that the spindle is free.

ri retracting spring 8 is provided on the spindle a for pressing thespindle downwardly and as shown in this instance, the spring iscompressed between a collar 9 on the spindle and a plate l0 surroundingthe spindle and located within the socket T against set screws ll, sothat the plate l() does not press frictionally upon the base of therevolving collar j). Any other suitable means may be provided .forforcing the spindle downwardly.

Suitable means arc provided for holding' the valve B, in this instancethe lower end l2 of the spindle 'a being reduced and screw threaded andadapted to be inserted in a screw threaded aperture in the valve. icollar lll is preferably pinned to the spindle by means of the pin l5and provided with an arm 16 having a boss 17 through which extends a pin1S having a spring 19 secured at one end to the pin and at the other endto the arm 16. This pin adapted to be seated. in an aperture Q() boredin the 'valve for this purpose. l have illustrated one suitable forni ofdevice for hold ing the valve and causing it to more with the spindle,but any other suitable device may be provided.

The seat or rest may be adjusted on the socket-K as by means of the setscrew 2l, so that the effective length of the spindle a may be varied inplacing the tool upon the su'PnQrtln Fig. 2 the feet E are shown theleiter rim of .the rest D, While in Fig. the rest is reversed, placingthe feet Il uppermost, so that an additional adjustment is obtained.

The number of teeth on the various parts of the device may be chosen asdesired, but in this instance, I have shown the gear S provided withfortyfeight teeth and the pin-I ion G provided with vtwelve teeth, sothatfour revolutions of the crank O and pinion G will eteet onereYQluton of the gear S. The bevel geary'. in this instance is providedwith lifteen teeth, and t-he segment o forms a pgrtien of a gear ofsiity teeth, so. that one strolte of the segment in one .direction Willro.- tate the bevel gear through a predetermined distanee. In theadjustment Of the parts shoivnin the drawings., the segment is designedto rotate the bevel gear through one quarter of a revolution at eachstroke in one direction By varying the position of. the pin X. in theann V the stroke of the segnient will he varied and the rotation of thebevel gear will be varied.

ln the Construction and adjustment of the tool shown in the drawings.,the length ofv the am 3., i is adjusted to sub-.tend teeth on the gearS, s o that the clutch members t and o are disengaged duringone eighthof a revglution of the gear fS, and during one half ofa revolution o .tthe pinion R and Crank .O- This disengagement of the .Clutch membersaise occurs for one stroke of the. segment e in one. direction and forone quarf ter of one revolution of the bevel gear The pressure ef thevalve B on its seat C during the. operation of grinding is t0ntrolled bythe spring- S- To this end the slots af, b, c, rl.- are Slightly deeperthan the. length off the teeth and .1/ the eluteh member e When the toolis seated on the engine fraaie or other Part unen which it is to. rest,With the dutch members in eu.- gagement, one member vill. be slightlyrsepa, rated from the others as illustrated iin Eig. l, thereby bringingthe entire pressure of the spring to. hear upon the valve seat- Theweight of the valve and the weight of the spindle and its.. attaehedparte. alsa Presses the valve upon. its. seat The operation of thedevice is as follows The valve- B,` is iirst attached to the holder asillustrated in Fig. l', and then the rest or support D is adjusted onthe socket K so that when the valve is sea t ed,e with the support D onthe valve chamber, there is a slight clearance between the clutchmembers t and o to enable the spring 8 to press the valve upon its seat.The handle I is grasped with one hand and the crank O is continuouslyrotated whereby the arm V and pin X reciprocate the arm g and segment e'connected thereto. The bevel gear y' is reciprocated back and forththrough one cycle.

vSpindle u and raises the spindle and clutch member o, disengaging theclutch members. t, o, during one stroke of the segment e, againreleasing the spindle u and connecting the clutch members at the end ofsaid stroke of the segment. During the time that the clutch members t, eare disengaged, the

spindle u Will remain stationary, but the bevel gear j is being actuatedso that on the return stroke of the segment e with the clutch members t,o, engaged, the reciprocation .0.f the valve B is continued, but withthe valve advanced through one quarter of One revolution. In thecontinued operation of the device the valve is advanced through onequarter of one. revolution at ever-y fourth revolution of the crank O.It is, of course, to be nnderstood that I have described my inventionwith a particular adjustment of the parts of the tool, bnt variousadjustments may be made, and combinations of varying number of teeth maybe used so. that a periodic advance of the valve may be obtained at anyinterval desired and through any desired are.

The reciprocation and progressive movenient ofv the valve in theoperation of the device may be nest illustrated diagrammatically asshown in Fig. 5, in which there are twelvediagranis shown- Qf thesediagrams4 l., 2 and; 3F correspond; to. the three po; sitiOllS. ot'- theparts illustrated in Figs. l, 2 and 3. The. remaining diagrams in groupsof; three illustrate the completion of the In these diagrams the lowerehi-teh member is illustrated at t and the upper clutch member at if.The lower clutch member t is provided with the apertures a, b, e, d andtheupper eluteh nieinher e is provided with the teeth w, y shown inblack. The arm. 16. is. illust-rated diagralnniatoally and is connectedto move` with the upper clutch meramber` o. The segment e is representeddiagrannnatieallr and the dotted aire.7 l0 represents the arc ofreciproca-tion of the valgve. during the. diiierent periods.

Ijn Fig. 1, the segment e is. shown just starting, its stroke to the.right the dires. tion. ofthe arrow` 5.0 and the eluteh members; zt and,a are shown in engagement. The arm 16 of the valve holder is show-nextending horizontally to. the left. This position of the parts is shownin Fig. 5 diagram l. As the segment e moves to the right the gear Srotates clockwise and the cam 3, 4 starts to pass under roller 30 tolift the spindle u. Previous to this time the valve B has beenreciprocated back and forth through the arcr represented by the arrow 40in diagram 1 of Fig. 5.

In Fig. 2, the segment e is shown in mid position and the cam is underthe roller 30. The clutch member 'v has been disengaged from member tand diagram 2 of Fig. 5 illustrates this position of the parts. The arm16 of the valve holder remains in position extending to the left as thesegment e completes its stroke.

In Fig. 3, the segment e has completed its stroke to the right and thecam 3, 4 has passed fromV beneath the roller 30 thereby permitting theclutch members t and 'U to become engaged again. This position of theparts is illustrated in diagram 3 of Fig. 5. It wil-l be seen thatduring the stroke of the segment e described, from the position of Fig.l to position of Fig. 3, the spindle n has been left at rest, while thebevel gear has been rotated through one quarter of one revolution. Onthe neXt return stroke of the segment c to the left, starting from theposition in Fig. 3, the gear y' and with it the spindle 'a will first berotated through one quarter of a revolution in the reverse direction,thus moving the arm 16 forward through one quarter of a revolution asillustrated in the diagram 4 of Fig. 5. he valve will be reciprocatedthrough the arc represented by the arrow 40 in diagram 4 until the cam3, 4 once more raises the clutch member i) out of engagement with membert. This disengagement starts to take place when the segment e isbeginning one stroke to the right as illustrated in diagrams 4, 5 and 6.During this period of operation the arm 16 is left in the-positionindicated in diagrams 4, 5 and 6 until the next return stroke of segmente which moves the valve forward through one quarter of one revolutionbringing the arm 16 into the position indicated in diagram 7 of Fig. 5.Reciprocation of the valve 6 takes place through the arc indicated byarrow 40 in diagram 7, until the next disengagement of the clutchmembers. Vhen this has occurred, the parts are in position to rotate thevalve through the last quarter of-one revolution as indicated in diagram10 of Fig. 5. Reciprocation of the valve then takes place through thearc indicated by the arrow 40 in diagram l0 and the cycle is completeand ready for the commencement of a new cycle when the valve starts toreciprocate through the original are illustrated in diagram l of Fig. 5.

I claim and desire to obtain by Letters Patent the following:

l. A valve grinding device, comprising means for reciprocating a valvethrough an adjustable arc. and means for periodically advancing thevalve through an adjustable arc.

2. A valve grinding device, comprising means for reciprocating thevalve, means for adjusting the arc through which said valve isreciprocated, means for advancing the valve periodically, and means foradjusting the arc through which said valve is advanced.

3. A valve grinding device, comprising a spindle, a valve holderconnected thereto, a gear, means for continuously reciprocating saidgear, and adjustable means for connecting and disconnecting the spindleand gear.

4. A valve grinding device, comprising a valve holder, means forreciprocating said holder, and an adjustable seat or support on saidvalve grinding device.

5. A valve grinding device, comprising a valve holder, means forreciprocating the same, a seat or support, and means for adjusting thedistance between said seat or support and the valve holder.

6. A valve grinding device, comprising a valve holder, a gear connectedto said holder, and means for operating said holder' through thefollowing cycle: reciprocating the holder back and forth throughsubstantially equal arcs, periodically advancing the valve always in thesame direction, whereby a progressive intermittent rotation is impartedto the valve, and again reciprocating the valve through equal arcs, andrepeating the cycle continuously.

7. A valve grinding device, comprising a valve holder, and mechanism forautomatically operating the valve holder through the following cycle:first reciprocating the valve holder through substantially equal arcs,then after a given interval of time, rotating the holder through a givenarc in one direction, and again reciprocating the holder through equal.'arcs, then advancing the holder in the same direction of rotation asbefore, and continuing the cycle, whereby the valve holder' isperiodically advanced on its seat, and reciprocated.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

ROBERT H. HAZELTINE.

Witnesses HERBERT G. OGDEN, Gao. A. HOFFMAN.

